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-rw-r--r--src/3rdparty/harfbuzz/src/harfbuzz-thai.c460
1 files changed, 0 insertions, 460 deletions
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c b/src/3rdparty/harfbuzz/src/harfbuzz-thai.c
deleted file mode 100644
index fe3296e887..0000000000
--- a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c
+++ /dev/null
@@ -1,460 +0,0 @@
-/*
- * Copyright (C) 2015 The Qt Company Ltd
- *
- * This is part of HarfBuzz, an OpenType Layout engine library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
-#include "harfbuzz-shaper.h"
-#include "harfbuzz-shaper-private.h"
-#include "harfbuzz-external.h"
-
-#include <assert.h>
-#include <stdio.h>
-
-#define LIBTHAI_MAJOR 0
-
-/*
- * if libthai changed please update these codes too.
- */
-struct thcell_t {
- unsigned char base; /**< base character */
- unsigned char hilo; /**< upper/lower vowel/diacritic */
- unsigned char top; /**< top-level mark */
-};
-typedef int (*th_brk_def) (const unsigned char*, int*, size_t);
-typedef int (*th_render_cell_tis_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
-typedef int (*th_render_cell_win_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
-typedef int (*th_render_cell_mac_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
-typedef size_t (*th_next_cell_def) (const unsigned char *, size_t, struct thcell_t *, int);
-
-/* libthai releated function handles */
-static th_brk_def th_brk = 0;
-static th_next_cell_def th_next_cell = 0;
-static th_render_cell_tis_def th_render_cell_tis = 0;
-static th_render_cell_win_def th_render_cell_win = 0;
-static th_render_cell_mac_def th_render_cell_mac = 0;
-
-static int init_libthai() {
- static HB_Bool initialized = false;
- if (!initialized && (!th_brk || !th_next_cell || !th_render_cell_tis || !th_render_cell_win || !th_render_cell_mac)) {
- th_brk = (th_brk_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_brk");
- th_next_cell = (th_next_cell_def)HB_Library_Resolve("thai", LIBTHAI_MAJOR, "th_next_cell");
- th_render_cell_tis = (th_render_cell_tis_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_tis");
- th_render_cell_win = (th_render_cell_win_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_win");
- th_render_cell_mac = (th_render_cell_mac_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_mac");
- initialized = true;
- }
- if (th_brk && th_next_cell && th_render_cell_tis && th_render_cell_win && th_render_cell_mac)
- return 1;
- else
- return 0;
-}
-
-static void to_tis620(const HB_UChar16 *string, hb_uint32 len, char *cstr)
-{
- hb_uint32 i;
- unsigned char *result = (unsigned char *)cstr;
-
- for (i = 0; i < len; ++i) {
- if (string[i] <= 0xa0)
- result[i] = (unsigned char)string[i];
- else if (string[i] >= 0xe01 && string[i] <= 0xe5b)
- result[i] = (unsigned char)(string[i] - 0xe00 + 0xa0);
- else
- result[i] = (unsigned char)~0; // Same encoding as libthai uses for invalid chars
- }
-
- result[len] = 0;
-}
-
-/*
- * ---------------------------------------------------------------------------
- * Thai Shaper / Attributes
- * ---------------------------------------------------------------------------
- */
-
-/*
- * USe basic_features prepare for future adding.
- */
-#ifndef NO_OPENTYPE
-static const HB_OpenTypeFeature thai_features[] = {
- { HB_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty },
- { HB_MAKE_TAG('l', 'i', 'g', 'a'), CcmpProperty },
- { HB_MAKE_TAG('c', 'l', 'i', 'g'), CcmpProperty },
- {0, 0}
-};
-#endif
-
-/* TIS-to-Unicode glyph maps for characters 0x80-0xff */
-static int tis620_0[128] = {
- /**/ 0, 0, 0, 0, 0, 0, 0, 0,
- /**/ 0, 0, 0, 0, 0, 0, 0, 0,
- /**/ 0, 0, 0, 0, 0, 0, 0, 0,
- /**/ 0, 0, 0, 0, 0, 0, 0, 0,
- 0x0020, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
- 0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
- 0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
- 0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
- 0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
- 0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
- 0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
- 0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
- 0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
- 0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
- 0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
- 0x0e58, 0x0e59, 0x0e5a, 0x0e5b, 0, 0, 0, 0
-};
-
-static int tis620_1[128] = {
- 0xf89e, 0, 0, 0xf88c, 0xf88f, 0xf892, 0xf895, 0xf898,
- 0xf88b, 0xf88e, 0xf891, 0xf894, 0xf897, 0, 0, 0xf899,
- 0xf89a, 0, 0xf884, 0xf889, 0xf885, 0xf886, 0xf887, 0xf888,
- 0xf88a, 0xf88d, 0xf890, 0xf893, 0xf896, 0, 0, 0,
- /**/ 0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
- 0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
- 0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
- 0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
- 0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
- 0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
- 0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
- 0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
- 0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
- 0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0, 0x0e4f,
- 0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
- 0x0e58, 0x0e59, 0, 0, 0xf89b, 0xf89c, 0xf89d, 0
-};
-
-static int tis620_2[128] = {
- 0xf700, 0xf701, 0xf702, 0xf703, 0xf704, 0x2026, 0xf705, 0xf706,
- 0xf707, 0xf708, 0xf709, 0xf70a, 0xf70b, 0xf70c, 0xf70d, 0xf70e,
- 0xf70f, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
- 0xf710, 0xf711, 0xf712, 0xf713, 0xf714, 0xf715, 0xf716, 0xf717,
- 0x00a0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
- 0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
- 0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
- 0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
- 0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
- 0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
- 0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
- 0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
- 0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
- 0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
- 0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
- 0x0e58, 0x0e59, 0x0e5a, 0x0e5b, 0xf718, 0xf719, 0xf71a, 0
-};
-
-enum ThaiFontType {
- TIS,
- WIN,
- MAC
-};
-
-static int thai_get_glyph_index (ThaiFontType font_type, unsigned char c)
-{
- switch (font_type){
- case TIS: return (c & 0x80) ? tis620_0[c & 0x7f] : c;
- case WIN: return (c & 0x80) ? tis620_1[c & 0x7f] : c;
- case MAC: return (c & 0x80) ? tis620_2[c & 0x7f] : c;
- default: return 0;
- }
-}
-
-static int thai_contain_glyphs (HB_ShaperItem *shaper_item, const int glyph_map[128])
-{
- unsigned char c;
-
- for (c = 0; c < 0x80; c++) {
- if ( glyph_map[c] ) {
- if ( !shaper_item->font->klass->canRender (shaper_item->font, (const HB_UChar16 *) &glyph_map[c], 1) )
- return 0;
- }
- }
- return 1;
-}
-
-static ThaiFontType getThaiFontType(HB_ShaperItem *shaper_item)
-{
- if ( thai_contain_glyphs (shaper_item, tis620_2) )
- return MAC;
- else if ( thai_contain_glyphs (shaper_item, tis620_1) )
- return WIN;
- else
- return TIS;
-}
-
-/*
- * convert to the correct display level of THAI vowels and marks.
- */
-static HB_Bool HB_ThaiConvertStringToGlyphIndices (HB_ShaperItem *item)
-{
- char s[128];
- char *cstr = s;
- const HB_UChar16 *string = item->string + item->item.pos;
- const hb_uint32 len = item->item.length;
- unsigned short *logClusters = item->log_clusters;
- hb_uint32 i = 0, slen = 0;
-
- if (!init_libthai())
- return HB_BasicShape (item);
-
- if (len >= 128)
- cstr = (char *)malloc(len*sizeof(char) + 1);
-
- if (!cstr)
- return HB_BasicShape (item);
-
- to_tis620(string, len, cstr);
-
- /* Get font type */
- static ThaiFontType font_type;
- static HB_Font itemFont;
- if (itemFont != item->font) {
- font_type = getThaiFontType (item);
- itemFont = item->font;
- }
-
- /* allocate temporary glyphs buffers */
- HB_STACKARRAY (HB_UChar16, glyphString, (item->item.length * 2));
-
- while (i < item->item.length) {
- struct thcell_t tis_cell;
- unsigned char rglyphs[4];
- int cell_length;
- int lgn = 0;
- HB_Bool haveSaraAm = false;
-
- cell_length = (int)(th_next_cell ((const unsigned char *)cstr + i, len - i, &tis_cell, true)); /* !item->fixedPitch); */
- haveSaraAm = (cstr[i + cell_length - 1] == (char)0xd3);
-
- /* set shaper item's log_clusters */
- logClusters[i] = slen;
- for (int j = 1; j < cell_length; j++) {
- logClusters[i + j] = logClusters[i];
- }
-
- /* Find Logical Glyphs by font type */
- switch (font_type) {
- case TIS: lgn = th_render_cell_tis (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
- case WIN: lgn = th_render_cell_mac (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
- case MAC: lgn = th_render_cell_win (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
- }
-
- /* Add glyphs to glyphs string and setting some attributes */
- for (int lgi = 0; lgi < lgn; lgi++) {
- if ( rglyphs[lgi] == 0xdd/*TH_BLANK_BASE_GLYPH*/ ) {
- glyphString[slen++] = C_DOTTED_CIRCLE;
- } else if ((unsigned char)cstr[i] == (unsigned char)~0) {
- // The only glyphs that should be passed to this function that cannot be mapped to
- // tis620 are the ones of type Inherited class. Pass these glyphs untouched.
- glyphString[slen++] = string[i];
- if (string[i] == 0x200D || string[i] == 0x200C) {
- // Check that we do not run out of bounds when setting item->attributes. If we do
- // run out of bounds then this function will return false, the necessary amount of
- // memory is reallocated, and this function will then be called again.
- if (slen <= item->num_glyphs)
- item->attributes[slen-1].dontPrint = true; // Hide ZWJ and ZWNJ characters
- }
- } else {
- glyphString[slen++] = (HB_UChar16) thai_get_glyph_index (font_type, rglyphs[lgi]);
- }
- }
-
- /* Special case to handle U+0E33 (SARA AM): SARA AM is normally written at the end of a
- * word with a base character and an optional top character before it. For example, U+0E0B
- * (base), U+0E49 (top), U+0E33 (SARA AM). The sequence should be converted to 4 glyphs:
- * base, hilo (the little circle in the top left part of SARA AM, NIKHAHIT), top, then the
- * right part of SARA AM (SARA AA).
- *
- * The painting process finds out the starting glyph and ending glyph of a character
- * sequence by checking the logClusters array. In this case, logClusters array should
- * ideally be [ 0, 1, 3 ] so that glyphsStart = 0 and glyphsEnd = 3 (slen - 1) to paint out
- * all the glyphs generated.
- *
- * A special case in this special case is when we have no base character. When an isolated
- * SARA AM is processed (cell_length = 1), libthai will produce 3 glyphs: dotted circle
- * (indicates that the base is empty), NIKHAHIT then SARA AA. If logClusters[0] = 1, it will
- * paint from the second glyph in the glyphs array. So in this case logClusters[0] should
- * point to the first glyph it produces, aka. the dotted circle. */
- if (haveSaraAm) {
- logClusters[i + cell_length - 1] = cell_length == 1 ? slen - 3 : slen - 1;
- if (tis_cell.top != 0) {
- if (cell_length > 1) {
- /* set the logClusters[top character] to slen - 2 as it points to the second to
- * lastglyph (slen - 2) */
- logClusters[i + cell_length - 2] = slen - 2;
- }
- }
- /* check for overflow */
- if (logClusters[i + cell_length - 1] > slen)
- logClusters[i + cell_length - 1] = 0;
- }
-
- i += cell_length;
- }
- glyphString[slen] = (HB_UChar16) '\0';
-
- /* for check, should reallocate space or not */
- HB_Bool spaceOK = (item->num_glyphs >= slen);
-
- /* Convert to Glyph indices */
- HB_Bool haveGlyphs = item->font->klass->convertStringToGlyphIndices (
- item->font,
- glyphString, slen,
- item->glyphs, &item->num_glyphs,
- item->shaperFlags);
-
- HB_FREE_STACKARRAY (glyphString);
-
- if (len >= 128)
- free(cstr);
-
- return (haveGlyphs && spaceOK);
-}
-
-/*
- * set the glyph attributes heuristically.
- */
-static void HB_ThaiHeuristicSetGlyphAttributes (HB_ShaperItem *item)
-{
- /* Set Glyph Attributes */
- hb_uint32 iCluster = 0;
- hb_uint32 length = item->item.length;
- while (iCluster < length) {
- int cluster_start = item->log_clusters[iCluster];
- ++iCluster;
- while (iCluster < length && item->log_clusters[iCluster] == cluster_start) {
- ++iCluster;
- }
- int cluster_end = (iCluster < length) ? item->log_clusters[iCluster] : item->num_glyphs;
- item->attributes[cluster_start].clusterStart = true;
- for (int i = cluster_start + 1; i < cluster_end; i++) {
- item->attributes[i].clusterStart = false;
- }
- }
-}
-
-/*
- * THAI Shaping.
- */
-HB_Bool HB_ThaiShape (HB_ShaperItem *shaper_item)
-{
- if ( !HB_ThaiConvertStringToGlyphIndices (shaper_item) )
- return false;
-
- HB_ThaiHeuristicSetGlyphAttributes (shaper_item);
-
-#ifndef NO_OPENTYPE
- const int availableGlyphs = shaper_item->num_glyphs;
- if ( HB_SelectScript (shaper_item, thai_features) ) {
- HB_OpenTypeShape (shaper_item, /*properties*/0);
- return HB_OpenTypePosition (shaper_item, availableGlyphs, /*doLogClusters*/true);
- }
-#endif
-
- HB_HeuristicPosition (shaper_item);
- return true;
-}
-
-/*
- * Thai Attributes: computes Word Break, Word Boundary and Char stop for THAI.
- */
-static void HB_ThaiAssignAttributes(const HB_UChar16 *string, hb_uint32 len, HB_CharAttributes *attributes)
-{
- char s[128];
- char *cstr = s;
- int *break_positions = 0;
- int brp[128];
- int brp_size = 0;
- hb_uint32 numbreaks, i, j, cell_length;
- struct thcell_t tis_cell;
-
- if (!init_libthai())
- return ;
-
- if (len >= 128)
- cstr = (char *)malloc(len*sizeof(char) + 1);
-
- to_tis620(string, len, cstr);
-
- for (i = 0; i < len; ++i) {
- attributes[i].wordBreak = FALSE;
- attributes[i].wordStart = FALSE;
- attributes[i].wordEnd = FALSE;
- attributes[i].lineBreak = FALSE;
- }
-
- if (len > 128) {
- break_positions = (int*) malloc (sizeof(int) * len);
- memset (break_positions, 0, sizeof(int) * len);
- brp_size = len;
- }
- else {
- break_positions = brp;
- brp_size = 128;
- }
-
- if (break_positions) {
- attributes[0].wordBreak = TRUE;
- attributes[0].wordStart = TRUE;
- attributes[0].wordEnd = FALSE;
- numbreaks = th_brk((const unsigned char *)cstr, break_positions, brp_size);
- for (i = 0; i < numbreaks; ++i) {
- attributes[break_positions[i]].wordBreak = TRUE;
- attributes[break_positions[i]].wordStart = TRUE;
- attributes[break_positions[i]].wordEnd = TRUE;
- attributes[break_positions[i]].lineBreak = TRUE;
- }
- if (numbreaks > 0)
- attributes[break_positions[numbreaks - 1]].wordStart = FALSE;
-
- if (break_positions != brp)
- free(break_positions);
- }
-
- /* manage grapheme boundaries */
- i = 0;
- while (i < len) {
- cell_length = (hb_uint32)(th_next_cell((const unsigned char *)cstr + i, len - i, &tis_cell, true));
-
- attributes[i].graphemeBoundary = true;
- for (j = 1; j < cell_length; j++)
- attributes[i + j].graphemeBoundary = false;
-
- /* Set graphemeBoundary for SARA AM */
- if (cstr[i + cell_length - 1] == (char)0xd3)
- attributes[i + cell_length - 1].graphemeBoundary = true;
-
- i += cell_length;
- }
-
- if (len >= 128)
- free(cstr);
-}
-
-void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes)
-{
- assert(script == HB_Script_Thai);
- const HB_UChar16 *uc = text + from;
- attributes += from;
- HB_UNUSED(script);
- HB_ThaiAssignAttributes(uc, len, attributes);
-}
-
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